Grass burner



FIG. 1 is a perspective view of a grass burner showing our new design;

FIG. 2 is a right side view of the grass burner;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a plan view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a grass burner, as shown and described. 